Eaton Crouse-Hinds Series MTL4041B Intrinsically Safe Repeater Power Supply
ManufacturerEaton Crouse-Hinds series MTLModelMTL4041BProduct TypeIntrinsically Safe Repeater Power Supply
01Technical Summary
MTL4041B is a one-channel repeater power supply for conventional or smart two- or three-wire 4...20 mA transmitters in a hazardous area. It powers the field transmitter, repeats the current into a safe-area load, and passes bidirectional digital communication superimposed on the analog signal.
Configuration ControlMatch the exact model, ratings, installed system, wiring, required approvals, and hardware revision before ordering.
02Specifications
| Manufacturer | Eaton Crouse-Hinds series MTL |
|---|---|
| Model | MTL4041B |
| Product Type | Repeater power supply |
| Number of Channels | 1 |
| Field Devices | 2-wire or 3-wire 4...20 mA conventional or smart transmitter |
| Signal Range | 4...20 mA |
| Overrange / Underrange | 1.0...21.5 mA |
| Transmitter Voltage | 15 V minimum at 20 mA |
| Maximum Open-Circuit Voltage | 28 V |
| Digital Signal Bandwidth | 10 Hz...8 kHz |
| Safe-Area Load | 0...650 ohm conventional; 250 ohm +/-10% smart |
| Transfer Accuracy | Better than 20 microamp at 20 deg C |
| Response Time | Within 200 microamp of final value in 20 ms |
| Supply Requirement | 65 mA at 24 V DC with 20 mA signal |
| Power Dissipation | 1.2 W at 24 V with 20 mA signal |
| Isolation | 250 V AC between safe- and hazardous-area circuits |
| Operating Temperature | -20...+60 deg C continuous |
| Lifecycle | Obsolete; nearest equivalent MTL4541B |
03Features
Design and Function
- Provides a fully floating DC supply for a hazardous-area transmitter.
- Repeats the field current into a safe-area load with galvanic isolation.
- Supports bidirectional smart-transmitter communication on the 4...20 mA loop.
- Can also interface with hazardous-area current sources and selected vortex or turbine meters.
- Green LED provides power indication.
- Backplane mounting supports the original MTL4000 system architecture.
- Entity parameters and hazardous-area approvals are documented for certified loop design.
Verified Identity
Manufacturer: Eaton Crouse-Hinds series MTL
Model: MTL4041B
Product Type: Intrinsically Safe Repeater Power Supply
04Compatibility
- Confirm the MTL4000 backplane, terminal assignments, supply, safe-area load, and hazardous-area loop certificate.
- For smart communication, maintain the documented 250 ohm safe-area load condition.
- Verify two-wire or three-wire transmitter wiring before transferring the field loop.
- Do not substitute a DIN-rail MTL5500 module directly into an MTL4000 backplane.
- MTL4541B is the Eaton-listed nearest equivalent and is specifically adapted for MTL4041B substitution on legacy backplanes.
05Replacement & Lifecycle
- Eaton lists MTL4041B as obsolete and identifies MTL4541B as the nearest equivalent.
- Record field, HHC, output, and supply connections before removing the module.
- Review hazardous-area entity parameters and approvals even when the replacement has the intended legacy-backplane compatibility.
- After installation, test loop power, 4...20 mA transfer, smart communication, and the safe-area receiving load.
- Retain the loop drawing, certificate, and replacement assessment in the maintenance record.
06Applications
- Intrinsic-safety interface for hazardous-area two-wire transmitters.
- Three-wire 4...20 mA transmitter circuits using the documented connection.
- Smart-transmitter loops requiring bidirectional digital communication.
- Legacy MTL4000 backplane installations requiring an exact or Eaton-approved replacement.
FAQFrequently Asked Questions
What does MTL4041B do?
It powers a hazardous-area transmitter and repeats its 4...20 mA signal into a safe-area load.
Does it support smart transmitters?
Yes. It passes bidirectional digital communication superimposed on the 4...20 mA signal.
How many channels are provided?
MTL4041B is a one-channel module.
What safe-area load is required for smart communication?
The documented smart-transmitter load is 250 ohm plus or minus 10 percent.
Is MTL4041B current or obsolete?
Eaton lists it as obsolete.
What replacement does Eaton identify?
Eaton lists MTL4541B as the nearest equivalent for legacy-backplane substitution.
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